added a visual hint when loading

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
fixed vocabulary

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
improved the README

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
selection of region is implemented

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
disable the last choice if there is a new choice

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>